单选题明挖爆破施工,施工单位发出鸣10s,停,鸣10s,停,鸣10s的音响信号属于( )。A预告信号B起爆信号C准备信号D解除信号
单选题
明挖爆破施工,施工单位发出鸣10s,停,鸣10s,停,鸣10s的音响信号属于( )。
A
预告信号
B
起爆信号
C
准备信号
D
解除信号
参考解析
解析:
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